Electrical coil installation and fastener for the same



' w. 'c. MWFADDEN Filed June 11, 1938 Iwvmivr:

ELECTRICAL COIL INSTALLATION AND FASTENER FOR THE SAME Aug., l3, 1940.

' Patented Aug. 13, 1949 1 UNITED STATES PATENT OFFICE ELECTRICAL COIL INSTALLATION AND FASTENER FOR THE SAME Wilford C. MacFadden, Philadelphia, Pa., as-

signor to United-Carr Fastener Corporation, Cambridge, Mass, a. corporation of Massachusetts Application June 11, 1938, Serial No. 213,245

7 Claims. (01. 2.48 -l) My invention relates to a fastener member for improved fastener member 3 in a manner fully set securing electrical and the like units to a supportout in either one of my aforesaid co-pending ap- V ing structure and to installations of the same. plications so as to be fixed in upstanding relation An object of my invention is the provision of to the panel. An iron core I is disposed within the a fastener member directed to an improvement coil form I and has a threaded shank 5 extending 5 over those fastener devices illustrated and debeneath the core through the support 2 into coscribed in connection with my copending applicaoperating threaded engagement with portions of tions, Serial No. 174,641, filed November 15, 1937, the fastener member 3 in a manner to be deand Serial No. 193,473, filed March 2, 1938. scribed. 1 Thus the fastener member serves to Another object of my invention is to provide a secure the iron core to the support 2. At the 10 one-piece fastener member of improved construcsame time the fastener member serves to maintion adapted for use with an electrical unit, such tain the iron core in adjustable assembly with the as an assembly of an iron core with a coil form, coil form so that the frequency calibration of the whereby it serves not only to secure the coil form coil may be regulated by moving the iron core t a, supporting panel, but, also, to secure the axially of the coil form and relative to the wind- 1 iron core to the panel in a way to maintain the ings on the coil form, as will be understood by iron core in firm adjustable assembly with the those skilled in theart. a coil form. v Referring in detail to my preferred fastener Other objects and purposes of my invention will member, I have provided one of simple construcbe apparent from inspection of the drawing and tion which is preferably made of one piece of 20 specification hereinbelow set forth. sheet metal. The fastener member has a base Referring to the drawing, in which I have ilportion 6 which is bulged inwardly permitting a lustrated a preferred embodiment of my invencertain resiliency therein which aids to effect tion: attachment of the coil form to the support. The

Fig. 1 is a fragmentary front view of an inbase 6 has an aperture 1 therein (Figs. 3, 8 and 9) 2 stallation comprising a supporting panel and 2. adapted to receive the shank 5 of the iron core coil form and an iron core secured to the panel upon attachment of the iron core to the support.

by means of my improved fastener member; Legs 8-8 extend from opposed ends of the base 5 Fig. 2 is a view similar to Fig. 1 'but with the and pr vide h ok-like nw x en in p rinstallation turned 90; tions 9-9 for engaging the coil form I through 30 Fig. 3 is a bottom plan view of the installation apertures |0'l0 thereof to secure the coil form 1 shown in Fig. 1; to the supporting panel. The inwardly-extending Fig. 4 is a view similar to Fig. 2 showing the portions 9-5 are preferably cured at their outer manner in which the iron core is moved into s as most Clearly Shown in F 9, 0 cooperating fastener engagement with my imthat the coil form may be engaged therewith by proved fastener member; a relative rotative movement in the manner de- Fig. 5 is asection taken along the line 5-5 of scribed in connection with my (so-p Fig. 4; plication, Serial No. 193,473, filed March 2, 1938. 'Fig. 6 is a section taken along the line 6-6 An arm portion ll, integral with a longitudinal 40 of Fig. 2; edge of the base 6 intermediate the ends thereof, 0

Fig. 7 is a plan view of my improved fastener extends beneath the base 6 on anflopposite side member per se; thereof from the legs 8-8. The arm H has an Fig. 8 is a'bottom view of my fastener member inwardly-P Portion l2 p d from the per se; and base 6 and intersecting the opening I of the base Fig. 9' is a top view of my fastener member for a purpose to be described. The arm II is 45 per se. relatively stiff, but may yield slightly during Referring to the drawing, I have shown a preattaching engagement of the shank '5 of the ferred installation comprising an electrical unit iron core with the fastener member, as will be such as a coil form of the type commonly used in described. radio apparatus. The coil form has a tubular- Assembly of the component parts of my inshaped outer covering I of cardboard or other stallation is a relatively simple matter and may relatively stiff material which is adapted to be be carried out through moving the arms 8-8 of wound with a wire coil (not shown)- in the man-- the fastener member through the openings l3l3 her well known in the art. The unit is preferably of the support 2 so that the inwardly-extending secured to a supporting panel 2 by means of my portions 99 are disposed on one side of the '5 support, which may be called the upper side, and the base 6 is disposed on an opposite, or lower, side of the support. Next, the base 6 is substantially flattened by upward pressure exerted upon its opposed ends and the coil form moved toward the fastener member so as to engage the hooklike portions of one of the fastener legs 88 through one of the apertures IO thereof. Next, the coil form is rotated in the manner described in connection with my co-pending application, Serial No. 193,471, so as to engage the hook-like portion of the other leg 8 with the coil form through the other aperture l0 thereof. When pressure for flattening the base 6 is released, opposite ends of the base move toward normal position tending to pull the hook-like portions 9-9 toward the supporting panel 2 so as to engage them with material of the coil form adjacent the lower walls of the aperture Ill-i0, as most clearly shown in Fig. 1. Thus the coil form is secured in firm attachment to the support. Although I have preferred to illustrate my improved fastener member in connection with a relatively wide supporting panel having openings therein for receiving the legs 88 of the fastener member, it will be understood that my fastener member is equally useful in connection with a modified installation (not shown) wherein the supporting panel is of relatively narrow construction with the width thereof disposed entirely between the legs 88 of the fastened member so that the legs '8-8 are disposed outside the lateral edges of the panel.

In assembling the iron core 4 with the coil form, the iron core is moved into the open end of the coil form opposed to the end adjacent the support 2 and the shank 5 is passed axially of the coil form through a circular opening IA of the panel 2 (Figs. 5 and 6) and the opening 1 of the fastener base so that the shank abuts the inner surface I5 of the arm ll of the fastener member intermediate the portion I2;and the junction of the arm with the base 6 of the fastener, as most clearly shown in Fig. 4. After the coil form has been assembled as described thus far, it is loosely held within the coil form I in substantially central position relative to the walls of the form solely by loose engagement of the threaded shank 5 with the walls surrounding the opening I of the fastener base (Figs. 4 and 5). As downward movement of the shank 5 of theiron core through the opening 1 of the base is continued, the shank 5 is engaged by the relatively stiff arm ll of the fastener member. As a result of this engagement, the shank 5 is moved laterally against the wall of the aperture 1 so that portions of the threads of the shank enter into cooperating threaded engagement with a portion of the wall of the aperture l, as most clearly illustrated in Figs. 3 and 6. At the time the shank 5 is in cooperative threaded engagement with the wall of the aperture 1, the iron core is inclined slightly as a result of pressure of the arm I l upon the shank 5 with the result that the upper portion of the iron core is moved from substantially central position relative to the bore of the coil form I, as shown in Fig. 4, into abutting relation with the inner side of the coil form, as most clearly shown in Fig. 2. When the iron core is in final attached position with its shank in cooperative engagement with the wall of the aperture 1 of the fastener and its upper portion in engagement with the inner walls of the coil form, it is firmly maintained in assembly with the coil form and otherwise incapable of movement or vibration so as to cause fluctuation in the calibration of the coil. The frequency calibration of the coil may be wilfully adjusted by turning the iron core so as to move it either up or down. This result is accomplished by reason of the fact that the shank 5 of the iron core remains in cooperating threaded engagement with the wall of the aperture 1 of the fastener base as long as the shank of the iron core is engaged by the innermost laterally-projecting point I2 of the arm ll. 7

Although I have illustrated and described a preferred embodiment of my invention, I do not wish to be limited thereby because the scope of my invention is best defined by the following claims.

I claim:

1. In combination. a support having an opening therein, a tubular article disposed on one side of said support, a part disposed within said tubu lar article and afastener member having an apertured base disposed on the other side of said support from said tubular article, attaching means extending from said base above said support and engaging said tubular article for securing the same to said support, said part within said tubular article having a shank extending through said support and the base of said fastener member, and said base having integral means in interengaging relation with said shank to maintain said part disposed within said article in assembly with said support.

2. In combination, a support having an opening therein, a tubular article disposed on one side of said support, a part disposed within said tubular article and a fastener member having an apertured base disposed on the other side of said support from said tubular article, attaching means extending from said base above said support and engaging said tubular article for securing the same to said support, said part within said tubular article having a threaded shank extending through said support and the base of said fastener member, and said base having integral means in cooperating threaded engagement with said threaded shank to secure said part disposed within said tubular article to said support and maintain said part in adjustable assembly with said tubular article.

3. In combination, a support having an open ing therein, a hollow retainer member disposed on one side of said support, an article of manufacture disposed within said retainer member and a fastener member having a base disposed on the other side of said support from said retainer member, attaching means extending from said base above said support and engaging said retainer member for securing the same to said support, said base having an opening therein and an arm extending beyond one side of said base, said arm having a portion in alignment with the opening of said base, and said article of manufacture having a shank extending through said support and said opening of said fastener base, said shank having spaced laterally-projecting portions for engagement with the base of said fastener and said shank being engaged by said arm to move one of said spaced projecting portions thereof behind said base whereby said article is secured to said support in assembly with said retainer.

4. A fastener member for securing an article of manufacture to a support, said fastener having an apertured base portion, attaching means extending from said base for engaging said article to secure the same to said support, and an arm portion extending from said base having a portion in alignment with said aperture of said base for engagement with apart to be extended through said aperture.

5. A fastener member for securing an article of manufacture to a support, said fastener having an apertured base portion, attaching means extending from opposite ends of said base for engaging said article to secure the same to said support and an arm portion integral with an edge of said base between said ends, said arm having a portion in alignment with said aperture of said base for engagement with a part to be extended through said aperture.v

6. A fastener member, for securing an article of manufacture to a support, said fastener having an apertured base portion, attaching means extending from said base beyond a side thereof for engaging said article to secure the same to said support, and an arm portion extending from said base beyond an opposite side thereof from said attaching means, said arm having a portion in alignment with said aperture of said base for engagement with a part to be extended through said aperture.

7. A fastener member having a bulged. base portion; leg portions extending from opposite ends of said base portionha'ving portions at their free ends adapted to engage an article of manufacture for securing said article to a support, said base having'an aperture therein and an arm integral with said base intermediate said legs, said arm extending beyond an opposite side of said base from said legs and having a portion in alignment with the aperture of said base substantially as described.

WILFORD C. MAOFADDEN. 

